excel工作表密码保护-----解密篇

 一.打开EXCEL----->>工具--->>宏----->>脚本编辑器---->>选中当前工作表---->>输入下面脚本---->＞运行．．

Option Explicit

Public Sub AllInternalPasswords()
          ' Breaks worksheet and workbook structure passwords. Bob McCormick
          '    probably originator of base code algorithm modified for coverage
          '    of workbook structure / windows passwords and for multiple passwords
          '
          ' Norman Harker and JE McGimpsey 27-Dec-2002 (Version 1.1)
          ' Modified 2003-Apr-04 by JEM: All msgs to constants, and
          '     eliminate one Exit Sub (Version 1.1.1)
          ' Reveals hashed passwords NOT original passwords
          Const DBLSPACE As String = vbNewLine & vbNewLine
          Const AUTHORS As String = DBLSPACE & vbNewLine & _
                  "Adapted from Bob McCormick base code by" & _
                  "Norman Harker and JE McGimpsey"
          Const HEADER As String = "AllInternalPasswords User Message"
          Const VERSION As String = DBLSPACE & "Version 1.1.1 2003-Apr-04"
          Const REPBACK As String = DBLSPACE & "Please report failure " & _
                  "to the microsoft.public.excel.programming newsgroup."
          Const ALLCLEAR As String = DBLSPACE & "The workbook should " & _
                  "now be free of all password protection, so make sure you:" & _
                  DBLSPACE & "SAVE IT NOW!" & DBLSPACE & "and also" & _
                  DBLSPACE & "BACKUP!, BACKUP!!, BACKUP!!!" & _
                  DBLSPACE & "Also, remember that the password was " & _
                  "put there for a reason. Don't stuff up crucial formulas " & _
                  "or data." & DBLSPACE & "Access and use of some data " & _
                  "may be an offense. If in doubt, don't."
          Const MSGNOPWORDS1 As String = "There were no passwords on " & _
                  "sheets, or workbook structure or windows." & AUTHORS & VERSION
          Const MSGNOPWORDS2 As String = "There was no protection to " & _
                  "workbook structure or windows." & DBLSPACE & _
                  "Proceeding to unprotect sheets." & AUTHORS & VERSION
          Const MSGTAKETIME As String = "After pressing OK button this " & _
                  "will take some time." & DBLSPACE & "Amount of time " & _
                  "depends on how many different passwords, the " & _
                  "passwords, and your computer's specification." & DBLSPACE & _
                  "Just be patient! Make me a coffee!" & AUTHORS & VERSION
          Const MSGPWORDFOUND1 As String = "You had a Worksheet " & _
                  "Structure or Windows Password set." & DBLSPACE & _
                  "The password found was: " & DBLSPACE & "$$" & DBLSPACE & _
                  "Note it down for potential future use in other workbooks by " & _
                  "the same person who set this password." & DBLSPACE & _
                  "Now to check and clear other passwords." & AUTHORS & VERSION
          Const MSGPWORDFOUND2 As String = "You had a Worksheet " & _
                  "password set." & DBLSPACE & "The password found was: " & _
                  DBLSPACE & "$$" & DBLSPACE & "Note it down for potential " & _
                  "future use in other workbooks by same person who " & _
                  "set this password." & DBLSPACE & "Now to check and clear " & _
                  "other passwords." & AUTHORS & VERSION
          Const MSGONLYONE As String = "Only structure / windows " & _
                   "protected with the password that was just found." & _
                   ALLCLEAR & AUTHORS & VERSION & REPBACK
          Dim w1 As Worksheet, w2 As Worksheet
          Dim i As Integer, j As Integer, k As Integer, l As Integer
          Dim m As Integer, n As Integer, i1 As Integer, i2 As Integer
          Dim i3 As Integer, i4 As Integer, i5 As Integer, i6 As Integer
          Dim PWord1 As String
          Dim ShTag As Boolean, WinTag As Boolean
        
          Application.ScreenUpdating = False
          With ActiveWorkbook
              WinTag = .ProtectStructure Or .ProtectWindows
          End With
          ShTag = False
          For Each w1 In Worksheets
                  ShTag = ShTag Or w1.ProtectContents
          Next w1
          If Not ShTag And Not WinTag Then
              MsgBox MSGNOPWORDS1, vbInformation, HEADER
              Exit Sub
          End If
          MsgBox MSGTAKETIME, vbInformation, HEADER
          If Not WinTag Then
              MsgBox MSGNOPWORDS2, vbInformation, HEADER
          Else
            On Error Resume Next
            Do        'dummy do loop
              For i = 65 To 66: For j = 65 To 66: For k = 65 To 66
              For l = 65 To 66: For m = 65 To 66: For i1 = 65 To 66
              For i2 = 65 To 66: For i3 = 65 To 66: For i4 = 65 To 66
              For i5 = 65 To 66: For i6 = 65 To 66: For n = 32 To 126
              With ActiveWorkbook
                .Unprotect Chr(i) & Chr(j) & Chr(k) & _
                   Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & _
                   Chr(i3) & Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
                If .ProtectStructure = False And _
                .ProtectWindows = False Then
                    PWord1 = Chr(i) & Chr(j) & Chr(k) & Chr(l) & _
                      Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _
                      Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
                    MsgBox Application.Substitute(MSGPWORDFOUND1, _
                          "$$", PWord1), vbInformation, HEADER
                    Exit Do    'Bypass all for...nexts
                End If
              End With
              Next: Next: Next: Next: Next: Next
              Next: Next: Next: Next: Next: Next
            Loop Until True
            On Error GoTo 0
          End If
          If WinTag And Not ShTag Then
            MsgBox MSGONLYONE, vbInformation, HEADER
            Exit Sub
          End If
          On Error Resume Next
          For Each w1 In Worksheets
            'Attempt clearance with PWord1
            w1.Unprotect PWord1
          Next w1
          On Error GoTo 0
          ShTag = False
          For Each w1 In Worksheets
            'Checks for all clear ShTag triggered to 1 if not.
            ShTag = ShTag Or w1.ProtectContents
          Next w1
          If ShTag Then
              For Each w1 In Worksheets
                With w1
                  If .ProtectContents Then
                    On Error Resume Next
                    Do        'Dummy do loop
                      For i = 65 To 66: For j = 65 To 66: For k = 65 To 66
                      For l = 65 To 66: For m = 65 To 66: For i1 = 65 To 66
                      For i2 = 65 To 66: For i3 = 65 To 66: For i4 = 65 To 66
                      For i5 = 65 To 66: For i6 = 65 To 66: For n = 32 To 126
                      .Unprotect Chr(i) & Chr(j) & Chr(k) & _
                        Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _
                        Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
                      If Not .ProtectContents Then
                        PWord1 = Chr(i) & Chr(j) & Chr(k) & Chr(l) & _
                          Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _
                          Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
                        MsgBox Application.Substitute(MSGPWORDFOUND2, _
                              "$$", PWord1), vbInformation, HEADER
                        'leverage finding Pword by trying on other sheets
                        For Each w2 In Worksheets
                          w2.Unprotect PWord1
                        Next w2
                        Exit Do    'Bypass all for...nexts
                      End If
                      Next: Next: Next: Next: Next: Next
                      Next: Next: Next: Next: Next: Next
                    Loop Until True
                    On Error GoTo 0
                  End If
                End With
              Next w1
          End If
          MsgBox ALLCLEAR & AUTHORS & VERSION & REPBACK, vbInformation, HEADER
      End Sub